<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
   #d1{
       width: 100px;
       height: 100px;
       background-color: red;
       margin: 25px 0 0 25px;
       overflow:hidden;
   }
   #d1>div{
       width: 50px;
       height: 50px;
       background-color: blue;
       margin: 25px 0 0 25px;
   }
   #d2{
       width: 100px;
       height: 100px;
       border:5px solid green;
       border-radius: 5px;
       margin-left: 125px;
       padding:50px 0 0 50px;
       box-sizing: border-box;
   }
  </style>
</head>
<body>
<div id="d1">
  <div></div>
</div>
<div id="d2">哈喽</div>
</body>
</html>